Free-radical termination kinetics studied using a novel SP-PLP-ESR technique

Michael Buback, Mark Egorov, Thomas Junkers, Elena Panchenko

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85 Citations (Scopus)

Abstract

A novel method for measuring termination rate coefficient, kt, in free-radical polymerization is presented. A single laser pulse is used to instantaneously produce photoinitiator-derived radicals. During subsequent polymerization, radical concentration is monitored by time-resolved electron spin resonance (ESR) spectroscopy. The size of the free radicals, which exhibits a narrow distribution increases linearly with time t, which allows the chain-length dependence of kt to be deduced. The method will be illustrated using dodecyl methacrylate polymerization as an example.

Original languageEnglish
Pages (from-to)1004-1009
Number of pages6
JournalMacromolecular Rapid Communications
Volume25
Issue number10
DOIs
Publication statusPublished - 21 May 2004
Externally publishedYes

Keywords

  • ESR/EPR
  • Kinetics (polym.)
  • Pulsed-laser polymerization
  • Radical polymerization
  • Termination

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